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Unsecured Senior Notes Schedule of Unsecured Senior Notes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Jan. 20, 2016
Dec. 31, 2015
Debt Instrument [Line Items]      
Total $ 6,255,602   $ 5,264,819
Boston Properties Limited Partnership      
Debt Instrument [Line Items]      
Total 6,255,602   $ 5,264,819
Boston Properties Limited Partnership | Senior Notes [Member]      
Debt Instrument [Line Items]      
Principal Amount 6,300,000    
Net unamortized discount (13,148)    
Deferred Finance Costs, Net (31,250)    
Total $ 6,255,602    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 5.967%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 5.875%    
Effective Rate [1] 5.967%    
Principal Amount $ 700,000    
Maturity Date [2] Oct. 15, 2019    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 5.708%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 5.625%    
Effective Rate [1] 5.708%    
Principal Amount $ 700,000    
Maturity Date [2] Nov. 15, 2020    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 4.289%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 4.125%    
Effective Rate [1] 4.289%    
Principal Amount $ 850,000    
Maturity Date [2] May 15, 2021    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.853%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 3.70%    
Effective Rate [1] 3.853%    
Principal Amount $ 850,000    
Maturity Date [2] Nov. 15, 2018    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.954%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 3.85%    
Effective Rate [1] 3.954%    
Principal Amount $ 1,000,000    
Maturity Date [2] Feb. 01, 2023    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.279%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 3.125%    
Effective Rate [1] 3.279%    
Principal Amount $ 500,000    
Maturity Date [2] Sep. 01, 2023    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.916%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 3.80%    
Effective Rate [1] 3.916%    
Principal Amount $ 700,000    
Maturity Date [2] Feb. 01, 2024    
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.766%      
Debt Instrument [Line Items]      
Coupon/Stated Rate 3.65% 3.65%  
Effective Rate 3.766% [1] 3.766%  
Principal Amount $ 1,000,000 $ 1,000,000  
Maturity Date [2] Feb. 01, 2026    
[1] Yield on issuance date including the effects of discounts on the notes and the amortization of financing costs.
[2] No principal amounts are due prior to maturity.